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    <title>left</title>
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    <dt></a> 学生管理</dt>
    <dd><a href="addst.html" target="t_right">添加学生</a></dd>
    <dd><a href="seletest.html" target="t_right">查询学生</a></dd>
    <dd><a href="updatest.html" target="t_right">修改学生</a></dd>
    <dd><a href="deletest.html" target="t_right">删除学生</a></dd>


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